有多个输入测试用例，每一个用例一行，是一个0～9的整数，输入为0时则结束。屏幕显示如下：
样例输入                             样例输出
 2                                  case  1:
                                       1
                                      222
3
                                    case  2:
                                       1
                                      222
                                 33333
0
end